Clay-enhanced electrochemiluminescence and its application in the detection of glucose

Chih Sheng Ouyang*, Chong Mou Wang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

31 引文 斯高帕斯(Scopus)

摘要

Clay-modified electrodes were prepared with montmorillonite K10 and characterized in their ability to enhance the electrogenerated chemiluminescence (ECL) in a solution containing luminol and hydrogen peroxide. Montmorillonite K10 proved to be an effective catalyst for such a purpose, according to the anodic current and ECL intensity measured with the electrodes with and without clay particles. Under optimum conditions (pH 10 and 0.8 V vs. SCE), the ECL was enhanced by a factor of 10. Control experiments showed the enhanced ECL is likely due to a facilitation in the oxidation of luminol and H2O2 by the iron species contained in the clay. Double-step potential techniques suggested that superoxide is very likely to be the key reactive oxygen species involved in the clay-enhanced ECL reaction. In addition, clay/luminol/GOx electrodes were constructed by using aminopropyltrimethoxysilane as an immobilizing agent for the detection of glucose. Although the electrode sensitivity decreased by ca. 15% after 10 days, a linear calibration curve was attained, covering the concentrations of glucose from 10 μM to 0.5 mM with a detection limit at ca. 10 μM at pH 10.

原文英語
頁(從 - 到)2654-2659
頁數6
期刊Journal of the Electrochemical Society
145
發行號8
DOIs
出版狀態已發佈 - 1998 八月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 表面、塗料和薄膜
  • 電化學
  • 材料化學

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